This market resolves YES if Colorado Proposition 134 (Male and Female Participation in School Sports) is approved by voters at the November 3, 2026 general election under its official approval rule:

Simple majority of votes cast on the measure (statutory; SOS/Blue Book: 'Passes with a majority vote')

Only the November 3, 2026 vote counts; earlier votes on similar proposals do not. YES means voter approval at this election, not that the measure is later implemented.

What the votes mean (official summary):

• YES: School teams designated by biological sex or as mixed; schools must adopt sex-eligibility policies (Blue Book).

• NO: Schools and athletic associations keep setting their own eligibility policies under current law (Blue Book).

Results: resolves on the result certified by Colorado Secretary of State (official statewide canvass); takes effect on Governor's proclamation. It may resolve earlier once official returns or the Associated Press show the outcome cannot change and no recount is pending; if a recount or certified correction changes the outcome before resolution, the certified result controls.

No vote: if the measure is removed from the ballot, a court orders its votes not to be counted, or the vote is postponed beyond November 3, 2026, the market resolves N/A.

Later legal challenges: resolution follows voter approval as certified. A court later invalidating, enjoining or delaying the measure does not change the resolution.

Starting probability: 50% is a neutral starting seed, not a forecast.

Official source: https://leg.colorado.gov/ballots/male-and-female-participation-in-school-and-collegiate-sports-2/files/blue-book